[skip ci] Encoding

* Experiments with deflating with zlib

Author: petertrr

save-agent/src/linuxX64Main/kotlin/org/cqfn/save/agent/utils/FileUtils.kt

@@ -7,6 +7,44 @@ package org.cqfn.save.agent.utils
 import okio.FileNotFoundException
 import okio.FileSystem
 import okio.Path.Companion.toPath
+import platform.zlib.*
+
+import kotlinx.cinterop.UByteVar
+import kotlinx.cinterop.allocArray
+import kotlinx.cinterop.cValuesOf
+import kotlinx.cinterop.cstr
+import kotlinx.cinterop.memScoped
+import kotlinx.cinterop.pointed
+import kotlinx.cinterop.ptr
+import kotlinx.cinterop.readBytes
+import kotlinx.cinterop.reinterpret
+import kotlinx.cinterop.value
+
+/**
+ * @param s
+ * @return
+ */
+fun deflate(s: String): ByteArray = memScoped {
+    // val defstream: z_stream = z_stream()
+    // defstream.zalloc = Z_NULL
+    // defstream.zfree = Z_NULL
+    // defstream.avail_in = s.length.toUInt()  // size of input
+    // defstream.next_in = UByteVarOf<UByte>(s.cstr.ptr.rawValue).ptr
+    // defstream.avail_in = s.length.toUInt()  // size of input
+    val out = allocArray<UByteVar>(s.length)
+    // defstream.next_out = UByteVarOf<UByte>(out.rawValue).ptr
+    // deflateInit(defstream.ptr, Z_BEST_COMPRESSION)
+    // platform.zlib.deflate(defstream.ptr, Z_FINISH)
+    // deflateEnd(defstream.ptr)
+    val destLen = cValuesOf(s.length).ptr
+    compress(
+        out,
+        destLen.reinterpret(),
+        s.cstr.ptr.reinterpret(),
+        s.length.toULong()
+    )
+    return@memScoped out.readBytes(destLen.pointed.value)
+}
 
 /**
  * Read file as a list of strings

save-cloud-common/src/commonMain/kotlin/org/cqfn/save/utils/Utils.kt

@@ -0,0 +1,7 @@
+package org.cqfn.save.utils
+
+/**
+ * @param default
+ * @return
+ */
+fun String?.ifNullOrEmpty(default: () -> String) = (this ?: "").ifBlank(default)

save-orchestrator/src/main/kotlin/org/cqfn/save/orchestrator/filters/GzipDecodingFilter.kt

@@ -0,0 +1,12 @@
+package org.cqfn.save.orchestrator.filters
+
+import org.springframework.web.server.ServerWebExchange
+import org.springframework.web.server.WebFilter
+import org.springframework.web.server.WebFilterChain
+import reactor.core.publisher.Mono
+
+class GzipDecodingFilter : WebFilter {
+    override fun filter(exchange: ServerWebExchange, chain: WebFilterChain): Mono<Void> {
+        TODO("Not yet implemented")
+    }
+}